. Animal parasites and messmates. Parasites. 206 ANIMAL PARASITES AND MESSMATES. We have found in bats two taeniae, both incompletely developed, and occupying the digestive tube. One has a rostellum without hooks, like the taeniae of the vegetable- feeders, the other has hooks like those of the carnivora. These cestode parasites are observed to be of two prin- cipal forms ; the first vesicular, like the finger of a glove partly drawn inwards. They are always lodged in the midst of the flesh, or in a closed organ in the middle of a cyst; under this form the cestode worm is harboured by a host w
. Animal parasites and messmates. Parasites. 206 ANIMAL PARASITES AND MESSMATES. We have found in bats two taeniae, both incompletely developed, and occupying the digestive tube. One has a rostellum without hooks, like the taeniae of the vegetable- feeders, the other has hooks like those of the carnivora. These cestode parasites are observed to be of two prin- cipal forms ; the first vesicular, like the finger of a glove partly drawn inwards. They are always lodged in the midst of the flesh, or in a closed organ in the middle of a cyst; under this form the cestode worm is harboured by a host which is to serve as a vehicle to introduce him into his final host. He is a parasite on a journey; he is always agamous, and usually bears the name of cysti- cercus (Fig.' 49). As to the second form, it is like a ribbon; it attains a great length, always occupies the intestine, attains its com- plete and sexual develop- ment, and lays an innumer- able quantity of eggs which are disseminated with the evacuations. The rabbit harbours a cysticercua which has its final destination in the dog (a xenosite); but indepen- dently of this stranger, it Fig. 49.âCysticercua; a, upper part of glVeS hospitality to a Special the vesicle j 6, place where the vesicle iâ â¢â ⢠, ,. ml ⢠is about to separate! c, neck of the taenia m its mtestmeS. ThlS worm; d, the head, showing; the ⢠i at m ⢠suckers and the crown of hooks. IS ItS OWn Worm, the 1 SSnia pectinata, which is a nos- tosite. All the herbivora are in a similar case; the ox and the jsheep. possess a peculiar taenia of their own,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Beneden, M. van (Pierre Joseph), 1809-1894. New York, D. Appleton and Co.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectparasit, bookyear1876
